title: 12-(2-Hy-droxy-6-oxo-cyclo-hex-1-en-yl)-9,10-di-hydro-8H-benzo[a]xanthen-11(12H)-one.
abstract: In the xanthenone system of the title compound, C23H20O4, the pyran ring has a maximum deviation of 0.111 (1) Å from planarity and the outer cyclo-hexene ring exhibits a puckered conformation. The three methyl-ene C atoms of the cyclo-hexene ring bonded to the pyran unit are disordered over two sets of sites [occupancies = 0.570 (3) and 0.430 (3)]. In the crystal, mol-ecules are linked by C-H⋯O and O-H⋯O hydrogen bonds, forming a two-dimensional network parallel to (110). A C-H⋯π inter-action occurs between these networks.
authors.affiliation: Department of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Akkurt
authors.forename: Shaaban K
authors.initials: SK
authors.lastname: Mohamed
authors.forename: Alan R
authors.initials: AR
authors.lastname: Kennedy
authors.forename: Antar A
authors.initials: AA
authors.lastname: Abdelhamid
authors.forename: Gary J
authors.initials: GJ
authors.lastname: Miller
authors.forename: Mustafa R
authors.initials: MR
authors.lastname: Albayati